Overload protection device for amorphous alloy oil-immersed transformer

Abstract

The utility model discloses an amorphous alloy oil-immersed transformer overload protection device which comprises a transformer box body, and a cooling assembly is arranged on the transformer box body. The cooling assembly comprises a first cooler and a second cooler which are communicated with the interior of the transformer box body, and the first cooler is connected and communicated with the second cooler; the first cooler comprises a shell and a liquid outlet formed in the shell, a piston is further arranged in the shell, and a spring is further arranged on the face, away from the transformer box body, of the piston. When the temperature of oil in the transformer box body rises, the piston is jacked up, and when the piston moves upwards to the position above the liquid outlet, oil flows to the second cooler through the liquid outlet and then flows back to the interior of the transformer box body through the second cooler, on the basis, after the oil passes through the cooling assembly, heat in the oil is reduced, and the cooling efficiency of the oil is improved. Therefore, normal work of components in the transformer box body is guaranteed, and the transformer box body is worthy of popularization and application.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, in particular to an overload protection device for an amorphous alloy oil-immersed transformer. Background Technique

[0002] In order to achieve good insulation, heat dissipation and arc extinguishing effects, a large amount of transformer oil is generally filled inside the housing of an amorphous alloy transformer. This transformer oil plays a key role during the use of the transformer. Especially when the voltage is very high, a large amount of heat is generated, causing the temperature of the transformer oil to rise, thereby helping with heat dissipation and maintaining the stable operation of the transformer. However, when being under high voltage for a long time or suddenly being in a high-voltage state, it may cause damage to the housing, having safety defects. Therefore, although an amorphous alloy transformer needs to use transformer oil, attention also needs to be paid to solving the safety problems that may be caused by high temperature and high voltage. Content of the Utility Model

[0003] The purpose of the utility model is to provide an overload protection device for an amorphous alloy oil-immersed transformer to solve the problems raised in the above background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solution: An overload protection device for an amorphous alloy oil-immersed transformer, including a transformer box body, and a cooling assembly is provided on the transformer box body; the cooling assembly includes a first cooler and a second cooler that are communicated with the inside of the transformer box body, and the first cooler and the second cooler are connected and communicated with each other; the first cooler includes a housing, a liquid outlet opened on the housing, and a piston is further provided inside the housing, and a spring is further provided on the side of the piston away from the transformer box body.

[0005] As a preferred technical solution of the utility model: The housing is connected to the transformer box body through a provided connecting part, and heat dissipation plates are further provided on the outer wall surface of the housing.

[0006] As a preferred technical solution of the utility model: It further includes a shell cover, and is connected to the housing through the shell cover to cover the spring and the piston inside the housing.

[0007] As a preferred technical solution of the utility model: A guide rod is further provided on the piston, and the guide rod passes through the spring and slides in a guide hole provided on the shell cover.

[0008] As a preferred technical solution of the utility model: The second cooler is funnel-shaped.

[0009] As a preferred technical solution of the present utility model: One end of the second cooler is connected to the liquid outlet through a provided first connecting pipe, and the other end of the second cooler is connected to a liquid inlet provided on the transformer box through a provided second connecting pipe.

[0010] As a preferred technical solution of the present utility model: A check valve is further provided between the second connecting pipe and the second cooler.

[0011] By adopting the above technical solution, the beneficial effect of the present utility model is: When the internal oil temperature of the transformer box increases, the expanded oil moves upward, thereby pushing up the piston. When the piston moves upward until the liquid outlet is exposed, the oil flows through the liquid outlet to the second cooler and then flows back into the transformer box through the second cooler. By using the oil to flow on the cooling assembly, the heat in the oil is dissipated to the outside of the transformer box, thereby ensuring the normal operation of the components inside the transformer box. Based on this, the device can effectively solve the safety problem caused by the high temperature of the transformer. Description of the Drawings

[0012] Figure 1 It is a schematic connection structure diagram of the cooling assembly and the transformer box;

[0013] Figure 2 For Figure 1 A partial enlarged schematic diagram at position A in

[0014] Figure 3 It is a disassembled structure schematic diagram of the cooling assembly of the present utility model;

[0015] Figure 4 It is a disassembled structure schematic diagram of the first cooler of the present utility model;

[0016] Figure 5 It is a cross-sectional structure schematic diagram of the first cooler of the present utility model.

[0017] In the figure: 1. Transformer box; 2. Liquid inlet; 3. Cooling assembly; 30. First cooler; 31. Second cooler; 32. Check valve; 33. First connecting pipe; 34. Second connecting pipe; 35. Shell; 36. Liquid outlet; 37. Connecting part; 38. Heat dissipation plate; 39. Piston; 310. Spring; 311. Shell cover; 312. Guide rod; 313. Guide hole. Detailed Description of the Invention

[0018] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present utility model, and should not be construed as a limitation of the present utility model. In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "upper surface", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.

[0019] Please refer to Figures 1 - 5 , an embodiment provided by the present utility model: a non-crystalline alloy oil-immersed transformer overload protection device, including a transformer box body 1, and a cooling assembly 3 is provided on the transformer box body 1; the cooling assembly 3 includes a first cooler 30 and a second cooler 31 that are connected to the inside of the transformer box body 1, and the first cooler 30 and the second cooler 31 are connected and communicated; the first cooler 30 includes a housing 35, a liquid outlet 36 opened on the housing 35, and a piston 39 is further provided inside the housing 35, and a spring 310 is provided on the side of the piston 39 away from the transformer box body 1.

[0020] In summary, when the internal oil temperature of the transformer box body 1 rises, the expanded oil moves upward, thereby pushing up the piston 39. When the piston 39 moves upward until the liquid outlet 36 is exposed, the oil flows through the liquid outlet 36 to the second cooler 31, and then returns to the inside of the transformer box body 1 through the second cooler 31. By using the oil flowing on the cooling assembly 3, the heat in the oil is dissipated to the outside of the transformer box body 1, thereby ensuring the normal operation of the components inside the transformer box body 1. Based on this, the device can effectively solve the safety problem caused by the high temperature of the transformer.

[0021] Furthermore, since the housing 35 is connected to the transformer box body 1 through a provided connecting portion 37. For example, the connecting portion 37 is an external threaded column, and the transformer box body 1 is provided with an internal thread adapted thereto, so that the connection between the housing 35 and the transformer box body 1 can be realized.

[0022] Furthermore, since a heat dissipation plate 38 is further provided on the outer wall surface of the housing 35, the heat dissipation effect of the first cooler 30 can be further improved by using the heat dissipation plate 38; among them, the number of heat dissipation plates 38 is multiple, and they are circumferentially arranged on the outer circumferential surface of the housing 35;

[0023] In addition, to further improve the heat dissipation effect, the materials of the heat dissipation plate 38 and the housing 35 are preferably copper or aluminum alloy.

[0024] To ensure that the piston 39 can work smoothly and reliably, the first cooler 30 further includes a housing cover 311, and is connected to the housing 35 through the housing cover 311 to cover the spring 310 and the piston 39 inside the housing 35.

[0025] Furthermore, a guide rod 312 is provided on the piston 39, and the guide rod 312 slides in a guide hole 313 provided on the housing cover 311 after passing through the spring 310.

[0026] In summary, by using the guide rod 312 to slide in the guide hole 313 to guide the directional sliding of the piston 39, and at the same time using the connection between the housing cover 311 and the housing 35, the problem of the piston 39 falling off from the housing 35 can be prevented. In particular, when one end of the spring 310 contacts the piston 39 and the other end contacts the housing cover 311, when the temperature of the oil in the transformer box 1 decreases, the piston 39 can be promoted to move downward, which is beneficial to maintaining the pressure inside the transformer box 1.

[0027] On the basis of the above solution, since the second cooler 31 is funnel-shaped, when the oil flows into the second cooler 31, the volume of the oil becomes larger, and the contact area between the funnel-shaped second cooler 31 and the air is large, so the heat dissipation effect of the device is improved. In particular, after the oil enters the second cooler 31, the flow rate slows down, so the heat exchange time of the oil can be extended.

[0028] To facilitate the assembly of the cooling assembly 3, one end of the second cooler 31 is connected to the liquid outlet 36 through a first connecting pipe 33 provided, and the other end of the second cooler 31 is connected to the liquid inlet 2 provided on the transformer box 1 through a second connecting pipe 34. In actual use, the other end of the liquid inlet 2 away from the second connecting pipe 34 extends to the bottom surface of the transformer box 1 through a pipeline.

[0029] Furthermore, since a check valve 32 is provided between the second connecting pipe 34 and the second cooler 31, the check valve 32 can be used to prevent the oil from flowing into the second cooler 31 through the second connecting pipe 34.

[0030] In summary, due to the arrangement of the two connecting pipes, the two coolers are of a split structure, which is convenient for the independent production and processing of the two coolers and for the installation and replacement of the two coolers.

[0031] The above has described in detail the embodiments of the present utility model in conjunction with the accompanying drawings. However, the present utility model is not limited to the described embodiments. For those skilled in the art, without departing from the principle and spirit of the present utility model, various changes, modifications, substitutions, and variations made to these embodiments still fall within the protection scope of the present utility model.

Claims

1. An amorphous alloy oil-immersed transformer overload protection device, characterized in that: It comprises a transformer box (1), wherein a cooling assembly (3) is provided on the transformer box (1); The cooling assembly (3) comprises a first cooler (30) and a second cooler (31) which are in communication with the interior of the transformer box (1), and the first cooler (30) is in communication with the second cooler (31); The first cooler (30) comprises a shell (35), a liquid outlet (36) provided on the shell (35), a piston (39) provided inside the shell (35), and a spring (310) provided on a side of the piston (39) away from the transformer box (1).

2. The amorphous alloy oil-immersed transformer overload protection device according to claim 1 is characterized in that: The shell (35) is connected to the transformer box (1) via a connecting portion (37), and a heat sink (38) is also provided on the outer wall surface of the shell (35).

3. The amorphous alloy oil-immersed transformer overload protection device according to claim 2 is characterized in that: It also includes a shell cover (311), which is connected to the housing (35) via the shell cover (311) so as to cover the spring (310) and the piston (39) in the housing (35).

4. The amorphous alloy oil-immersed transformer overload protection device according to claim 3 is characterized in that: The piston (39) is also provided with a guide rod (312), and the guide rod (312) passes through the spring (310) and then slides in a guide hole (313) provided on the shell cover (311).

5. An amorphous alloy oil-immersed transformer overload protection device according to any one of claims 1 to 4, characterized in that: The second cooler (31) is funnel-shaped.

6. The amorphous alloy oil-immersed transformer overload protection device according to claim 5, characterized in that: One end of the second cooler (31) is connected to the liquid outlet (36) via a first connecting pipe (33), and the other end of the second cooler (31) is connected to a liquid inlet (2) provided on the transformer box (1) via a second connecting pipe (34).

7. The amorphous alloy oil-immersed transformer overload protection device according to claim 6, characterized in that: A one-way valve (32) is also provided between the second connecting pipe (34) and the second cooler (31).

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